Spare Tire problems of the 2000 Chrysler Sebring

I was driving 65 mph on route 495 after leaving route 66 from vienna, va. I was getting an uneven light thump feeling like I was driving lined pavement, but it is not on 495. I had a very strong pull of the steering wheel, and I checked my mirrors to see if I may have run over something. I saw the full circular part of my right front tire rolling across the highway behind me. I had to grab the steering wheel tightly to bring the vehicle across three lanes of highway to the breakdown lane. I was helped with putting on my spare tire, but only had about an inch of rubber left on the rim of my wheel. I drove to the waldorf office of tires plus on the spare and had the tire replaced the next morning after they found a replacement at approximately half price based on mileage.